One of the initial scenes, many people around a table, listening to the opening of the heredity of a very rich relative.One of the presents dies from eating too much in the place and they are now 1 less to share the heredity. While the whole movie, everybody is trying to kill each other and only one of them is innocent and don't want to kill nobody. Only he survives and takes all the heredity alone.

In one of the scenes, one of the hereditary which was a scientific too, was piloting a radio-controlled plane with explosives and the innocent guy hided below the truck where the scientific was and the plane exploded in the truck and the scientific died.

In another scene, the good and innocent guy was holding by the pants other of the hereditary on the roof of a building and trying to pull it. but the pants of the hereditary broke and the bad guy felt and died. Actually the bad guy that felt, just nailed in the floor. Only the but and the legs was visible. That makes me think it has to be a british comedy.

Sounds a lot like a German comedy from the 80s starring Dieter ("Didi") Hallervorden. German title is "Didi und die Rache der Enterbten" (Didi and the revenge of the disinherited). Here is a link to the imdb site (you can also google the title and will find some videos):

Thank you for the effort, Trevor!I think it is, frank!I think you solved this one!It looks different from the way I remember it but the same was with Robot Jox. Inside my memories Robot Jox was looking like Pacific Rim, but when I watched it again it was stop-motion. Ok, thank you again, frank! I don't see anywhere a way to give you karma or something. I guess somebody else would change the name of the post to SOLVED or something.Thanks! Bye!